将多个数组添加到args数组

Question

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I have a custom post type script in my functions.php (Wordpress) of which I do not understand its meaning.

$query_args = array(
'posts_per_page' => 5,
'post_type'      => $is_some_page ? CPT_ONE : CPT_TWO,
'post_status'    => 'publish',
'paged'          => 1
);

The script is loading perfect, no problems there.

Problem: I would like to add an additional post_type but I don't understand the : symbol... What is its meaning? And how to add more? This doesn't work:

'post_type' => $is_some_page ? CPT_ONE : CPT_TWO : CPT_THREE,

EDIT: Thanks for having a look and changing the labels for the question. Many thanks to everybody else for pointing me in the right direction with the operators.

Answer 1

What you are looking at is the ternary if operator (a lot of languages have this, including both PHP and Javascript).

So this:

$someVar = $someBool ? $val1 : $ val2

is equivalent to:

if ($someBool)
{
    $someVar = $val1;
}
else
{
    $someVar = $val2;
}

So this:

'post_type' => $is_some_page ? CPT_ONE : CPT_TWO : CPT_THREE

doesn't make sense because $is_some_page can only evaluate as true or false. But it's not clear what your logic should be. Under what situation do you want post_type to be CPT_ONE, CPT_TWO or CPT_THREE?

You could do something like this:

'post_type' => $is_some_page ? CPT_ONE : ($some_other_condition ? CPT_TWO : CPT_THREE)

Which is equivalent to an if / else if / else